Lights problems....

Found 22nd Mar 2010Found 22nd Mar 2010

I bought some lights for my living room from, the light has 9 little 10watt bulbs. the problem is that everything worked fine for a week or so then the bulbs started going off one by one BUT they not blown because if i move the bulbs about they come on but then go off(each bulb is on an individual string so they can be moved about) at the moment ive only got 3 that work and thats not enough light..any suggestions what the problem might be??